Thousandsofyearsago,itwascommontoseemanystarsinthesky. ...

问题详情：

Thousands of years ago, it was common to see many stars in the sky.  41 , this changed with the invention of   42 . Cities have gone brighter, using more lights. And that means most people in urban areas will never see beautiful groups of stars. They will never see a _43_ night sky and never be inspired by it.

   Today, people are  44_ by light ----- even at night time. Much of this light _45_ where it shouldn’t be---it creates light  46_ . For example, a person can put a light outside to shine on his own house. But the light could be so strong that it may  47_ shine on his neighbor’s house. The _48_ light shining on the neighbor’s house is one kind of light pollution.

   But is all this light really a big _49_ ? People need light to see, work and drive safely at night, and for many other things! But scientists say that this extra light has proven _50_ on living creatures---animals and humans.

   One kind of animal _51_ by light pollution is the bird. Many birds travel to a different area of the world to lay eggs,  52_ at night. But lights from tall buildings can _53_ the birds off their natural path. They may also crash into brightly lighted buildings, in danger of losing their _54_.

   Human beings experience problems _55_ light pollution too. Light affects some chemicals in people’s bodies. And people who are continually  _56_ to light at night have higher rates of health problems.

   People and animals need light, _57_  they also need darkness. Experts say that people must use light  _58_ . Only use the amount of light that you _59_. Don’t think that more light is better light. People also can greatly _60_ light pollution by using well-designed lights, which only shine light where it should be. Using less light and better lighting decisions reduces the energy people use.

41. A. Therefore          B. Besides           C. However          D. Meanwhile

42. A. cars               B. computers         C. television         D. electricity

43. A. special            B. natural           C. dark               D. big

44. A. surrounded         B. controlled        C. confirmed          D. affected

45. A. changes           B. moves            C. travels            D. grows

46. A. sources            B. levels            C. failure            D. pollution

47. A. also               B. just              C. still              D. again

48. A. direct              B. extra             C. sudden           D. close

49. A. difference          B. problem           C. loss              D. challenge

50. A. effects             B. results           C. costs              D. chances

51. A. expected           B. destroyed         C. influenced          D. discovered

52. A. early              B. usually           C. finally             D. immediately

53. A. scare              B. turn              C. stop              D. lead

54. A. sight              B. energy            C. life               D. way

55. A. because of          B. instead of         C. in case of          D. in front of

56. A. exposed            B. introduced        C. devoted            D. limited

57. A. if                 B. for               C. but                D. or

58. A. secretly            B. wisely            C. sincerely           D. openly

59. A. own               B. provide           C. need              D. love

60. A. cause              B. forget            C. reduce             D. forbid

【回答】

41-45 CDBAC   46-50 DABBA  51-55CBDCA  56-60 ACBCC

知识点：*经济文化类

题型：完型填空